<ng-container *ngIf="params.node.data.severity === 'High'">
  <span class="badge badge-danger">{{params.node.data.severity}}</span>
</ng-container>
<ng-container *ngIf="params.node.data.severity === 'Medium'">
  <span class="badge badge-warning">{{params.node.data.severity}}</span>
</ng-container>

